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Finding the Fourth Proportional to 72,195.50, 99,631.84 and 40,364.34

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Solution

The fourth proportional to 72,195.50, 99,631.84 and 40,364.34 is: 55,703.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,195.50 : 99,631.84 = 40,364.34 : x
  2. Step 2: Convert to fraction form
    72,195.50/99,631.84 = 40,364.34/x
  3. Step 3: Cross multiply
    72,195.50x = 99,631.84 × 40,364.34
  4. Step 4: Simplify right side
    72,195.50x = 4,021,573,464.59
  5. Step 5: Solve for x
    x = 4,021,573,464.59/72,195.50
  6. Step 6: Final answer
    x = 55,703.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.